bearing in mind that parallel lines have the same exact slope, then any parallel line to the one above will have the same slope as that one.

Answer: The surface area of the triangular prism is 448 square millimeters.
To find the surface area, we just need to input our values into the formula that is given.
SA = 2B + Ph
SA = 2(84) + 56(5)
SA = 168 + 280
SA = 448
The final surface area is 448 mm^2.
21 should be the right answer
Answer:
She could have subtracted 19 from both sides. Hope this helps :)
Step-by-step explanation: